By Jonathan Landay ZAPORIZHZHIA, Ukraine (Reuters) – Moscow was poised on Wednesday to annex a swath of Ukraine, releasing what it called vote tallies showing support in four partially occupied provinces to join Russia, after what Kyiv and the West denounced as illegal sham referendums held at gunpoint. On Moscow’s Red Square, a tribune with giant video screens has been set up, with billboards proclaiming “Donetsk, Luhansk, Zaporizhzhia, Kherson – Russia!” President Vladimir Putin could proclaim the annexation in a speech within days, just over a week since he endorsed the referendums, ordered…